Bessel-Wright transform in the setting of quantum calculus

Ilyes Karoui,Lazhar Dhaouadi,Wafa Binous,Meniar Haddad 강원경기수학회 2021 한국수학논문집 Vol.29 No.2

This work is devoted to the study of a q-harmonic analysis related to the q-analog of the Bessel-Wright integral transform. We establish some important properties of this transform and we focalise our attention in studying the associated transmutation operator.

A New Convolution Approach for the Time-delay Identification of Systems with Arbitrary Entries

Asma Karoui,Kaouther Ibn Taarit,Moufida Ksouri 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.6

In this paper, an online delay identification approach of continuous-time linear systems with unstructuredentries is achieved via a new algebraic technique. The arbitrary input and output trajectories are chosen with closeand abundant crossing zero. Initial conditions and static disturbances are taken into account in the design of theidentification approach. The proposed method is based on a distributional algebraic technique and a convolution approach. A proposed theorem is hence enounced to identify a single time-delay of such systems. The effectiveness ofthe proposed approach is demonstrated by an illustrative example. The obtained results show the high performancesof the proposed time-delay identification approach in severe operation conditions of the considered system.

The questionable effectiveness of code accidental eccentricity

Abderrahmane Ouazir,Asma Hadjadj,Hatem Gasmi,Hatem Karoui 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.83 No.1

The need to account for accidental torsion in seismic design is no longer debatable, however, the seismic codes’ requirement for accidental eccentricity has recently faced criticism. In order to get as close to real conditions as possible, this study investigated the impact of accidental torsion in symmetric RC multistory buildings caused by one of its many sources, the torsional earthquake component, and compared the results to those obtained by using the accidental eccentricity recommended by the codes (shifting the center of mass). To cover a wide range of frequencies and site conditions, two types of torsion seismic components were used: a recorded torsion accelerogram and five others generated using translation accelerograms. The main parameters that govern seismic responses, such as the number of stories (to account for the influence of all modes of vibration) and the frequency ratio (Ω) variation, were studied in terms of inter-story drift and displacement responses, as well as torsional moment. The results show that the eccentricity ratio of 5% required by most codes for accidental torsion should be reexamined and that it is prudent for computer analysis to use the static moment approach to implement the accidental eccentricity while waiting for new seismic code recommendations on the subject.

다양한 조건에 따른 지반함몰과 지중공동 확장에 대한 실험적 연구

정성윤 ( Seongyun Jeong ),타렉카루이 ( Tarek Karoui ),정영훈 ( Yeonghoon Jeong ),김동수 ( Dongsoo Kim ) 대한지질공학회 2017 지질공학 Vol.27 No.2

최근 도심지에서 자주 발생하는 지반함몰 문제는 사회적 문제로 대두되고 있으며, 지반함몰에 대한 시민들의 우려는 증가하고 있다. 그에 비해 지반함몰 발생 메커니즘에 대한 이해는 부족한 실정이다. 따라서 본 연구에서는 모형실험을 통해 다양한 지하수 조건에서 지하수와 토사가 동시에 유실될 때의 지반함몰 발생 메커니즘을 평가하고자 한다. 실험을 통해서 밝혀진 지반함몰 메커니즘의 주요 인자는 지하수 흐름 방향, 유출부위 주변 수두차, 지중 공동 유지를 위한 지반 내 강도 등이다. 첫째로 지하수와 토사가 동시에 유실될 때 토사의 유실은 지하수 흐름 방향을 따라 발생하며 이는 지중 공동 생성 및 공동 확장 방향을 결정짓는 요소임을 확인했다. 둘째로 지하수 및 토사가 유실되는 위치 주변의 수두차가 높아질수록 지반함몰 발생 속도가 급격히 빨라지는 것이 실험적으로 확인되었다. 마지막으로 지중 공동 확장으로 인해 최종적으로 갑작스런 붕괴를 일으킬 수 있음이 확인되었다. Recently frequent occurrence of ground subsidence cases has become social issue, and people`s concern on this problem has been growing accordingly. Meanwhile, understanding on the mechanism of ground subsidence formation is not enough. There-fore, this study aims for evaluating formation mechanism of ground subsidence under various groundwater conditions through model test when groundwater and soil are leaked together. Major factors found through model tests are direction of groundwater flow, head difference around the leakage point, and strehgth of the ground to support the underground cavity. Firstly, direction of groundwater flow has an influence on the direction of cavity expansion and ground collapse. Secondly, it is observed that the speed of ground subsidence formation increases as the head difference increases. Lastly, the expansion of the cavity can eventu-ally lead to a sudden collapse.

모형실험을 이용한 하수관 누수로 인한 지반함몰 메커니즘 평가

정영훈(Jeong, Yeong-Hoon),이문교(Lee, Moon-Gyo),Tarek Karoui,김동수(Kim, Dong-Soo) 한국지반신소재학회 2018 한국토목섬유학회 학술발표회 Vol.2018 No.9

European 1: A globally important clonal complex of Mycobacterium bovis

Smith, N.H.,Berg, S.,Dale, J.,Allen, A.,Rodriguez, S.,Romero, B.,Matos, F.,Ghebremichael, S.,Karoui, C.,Donati, C.,Machado, A.d.C.,Mucavele, C.,Kazwala, R.R.,Hilty, M.,Cadmus, S.,Ngandolo, B.N.R.,Habt Elsevier Science 2011 Infection, genetics and evolution Vol.11 No.6

We have identified a globally important clonal complex of Mycobacterium bovis by deletion analysis of over one thousand strains from over 30 countries. We initially show that over 99% of the strains of M. bovis, the cause of bovine tuberculosis, isolated from cattle in the Republic of Ireland and the UK are closely related and are members of a single clonal complex marked by the deletion of chromosomal region RDEu1 and we named this clonal complex European 1 (Eu1). Eu1 strains were present at less than 14% of French, Portuguese and Spanish isolates of M. bovis but are rare in other mainland European countries and Iran. However, strains of the Eu1 clonal complex were found at high frequency in former trading partners of the UK (USA, South Africa, New Zealand, Australia and Canada). The Americas, with the exception of Brazil, are dominated by the Eu1 clonal complex which was at high frequency in Argentina, Chile, Ecuador and Mexico as well as North America. Eu1 was rare or absent in the African countries surveyed except South Africa. A small sample of strains from Taiwan were non-Eu1 but, surprisingly, isolates from Korea and Kazakhstan were members of the Eu1 clonal complex. The simplest explanation for much of the current distribution of the Eu1 clonal complex is that it was spread in infected cattle, such as Herefords, from the UK to former trading partners, although there is evidence of secondary dispersion since. This is the first identification of a globally dispersed clonal complex M. bovis and indicates that much of the current global distribution of this important veterinary pathogen has resulted from relatively recent International trade in cattle.

Acute cholecystitis in pregnant women: A therapeutic challenge in a developing country center

Mohamed Fares Mahjoubi,Anis Ben Dhaou,Mohamed Maatouk,Nada Essid,Bochra Rezgui,Yasser Karoui,Mounir Ben Moussa 한국간담췌외과학회 2023 Annals of hepato-biliary-pancreatic surgery Vol.27 No.4

Backgrounds/Aims: Acute cholecystitis is a rare condition in pregnant women, potentially affecting the maternal and fetal prognosis. Our aim was to report the main clinical and paraclinical features of acute cholecystitis during pregnancy and therapeutic modalities. Methods: We conducted a case series analysis recording pregnant patients with acute cholecystitis admitted to our surgery department over a period of 11 years. We collected clinical data, paraclinical features, and management modalities related to cholecystitis. Results: There were 47 patients. Twenty-eight percent was in the first trimester of pregnancy, 40% in the second, and 32% in the third trimester. Abdominal pain was located in the right hypochondrium in 75% of cases. Fever was noted in 21% of cases. C-reactive protein was elevated in 39% of patients. Cholestasis markers were high in four patients. Abdominal ultrasound showed a distended gallbladder in 39 patients, with thickened wall in 34 patients, and gallbladder lithiasis in all cases. No patient had a dilated main bile duct. All patients received intravenous antibiotic therapy. Tocolysis was indicated in 32 patients. Laparoscopic cholecystectomy was performed in 32 cases (68%), and open cholecystectomy in 15 cases (32%). Postoperative course was uneventful in 42 patients, and complicated in 5 patients. Rate of complications was statistically higher after open cholecystectomy (p = 0.003). Morbidity rate was higher in the third trimester (p = 0.003). Conclusions: Delay in the diagnosis of acute cholecystitis during pregnancy can lead to serious complications. Management is based on antibiotic therapy and cholecystectomy. Laparoscopic cholecystectomy appears to be less morbid than open cholecystectomy.